Organic lithium-iodine battery based on two-electron transfer mechanism, manufacturing method and application thereof

By using an iodide cathode and an organic solvent containing chlorine additives to activate the I0/I+ redox reaction, a high-performance organic lithium-iodine battery was achieved. This solved the problems of low capacity, low redox potential, and poor low-temperature performance of existing lithium-iodine batteries, making it suitable for high-energy-density devices.

CN116264316BActive Publication Date: 2026-06-12CITY UNIVERSITY OF HONG KONG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CITY UNIVERSITY OF HONG KONG
Filing Date
2021-12-15
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing lithium-iodine batteries suffer from low capacity, low redox potential, poor long-cycle performance, and slow kinetics, especially under low-temperature conditions. Furthermore, the thermodynamic instability of elemental iodine limits its application scenarios.

⚗Method used

An organic lithium-iodine battery based on a two-electron transfer mechanism is adopted, using iodide as the positive electrode active material and an organic solvent containing chlorine additives as the electrolyte. The I0/I+ redox reaction is activated through a two-electron conversion mode, and a stable electrochemical system is formed by combining a lithium foil negative electrode and a carbon cloth current collector.

🎯Benefits of technology

It achieves high capacity, energy density, and high output voltage, with excellent low-temperature insensitivity and long-term cycle stability. The energy density is increased to 238% of that of traditional lithium-iodine batteries. It can still work stably at low temperatures and is suitable for electronic devices such as automobiles, computers, and robots.

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Abstract

The application provides an organic lithium-iodine battery based on a two-electron transfer mechanism and a manufacturing method and application thereof. The organic lithium-iodine battery comprises a positive electrode, a negative electrode and an organic electrolyte. The positive electrode active material used by the positive electrode comprises iodide and / or bromide, and the organic electrolyte comprises an organic solvent containing a chlorine-containing additive. The organic lithium-iodine battery uses iodide as the positive electrode active material, thereby avoiding the instability and safety hazards existing in the current I2 positive electrode. The organic solvent containing the chlorine-containing additive is used as the organic electrolyte, and excellent electrochemical performance is provided through a two-electron conversion mode. Compared with a traditional lithium-iodine battery, the organic lithium-iodine battery has higher capacity, energy density and higher output voltage. In addition, the organic lithium-iodine battery has excellent low-temperature insensitivity. At-25 DEG C, the battery realizes 2500 cycles at the cost of 20% capacity decay, and can still work stably at a low temperature of-30 DEG C.
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